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Research of Relief Annealing Technology for 304 Metal Rubber
ZHAO Cheng;LUO Kun;LI Xiang
   2011, 31 (6): 180-182.   DOI: 10.3969/j.issn.1006-1355-2011.06.041
Abstract （1970）            Save
Relief annealing technique of 304 Metal Rubber is researched. Test results show that relief annealing can significantly change the static loss factor and the dynamic loss factor of 304 Metal Rubber. It is found that the influences of annealing temperature, annealing time, Metal Rubber density and cooling manner on the static loss factor and the dynamic loss factor are obviously different. The optimal combination of the relief annealing parameters of 304 Metal Rubber is: annealing temperature 270 ℃, annealing time 25 minutes, Metal Rubber density 1.6 g/cm3, and oil cooling manner.
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VIV and Experimental Analysis of Seismo-Acoustic Detection Sysytem
LI Xiang;YAN Bing;ZHOU Sui-hua
   2011, 31 (2): 4-6.   DOI: 10.3969/j.issn.1006-1355-2011.02.002
Abstract （1990）            Save
Based on the principle and equation of vortex induced vibration (VIV), a vibration model of a cylindrical parts in the seismo-acoustic detection system is established, and the non-linear vibration equation is deduced and solved. The abnormal vibration in the signal is studied by comparing the experimental data. It is found that the bottom current induces the vibration of mounting pole outside the sealed cabin, so that the vibrating sensor receives this VIV signal. For this sake, the VIV suppression method, which can improve the design of detection system, is developed.
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